diff --git a/bugbear.py b/bugbear.py
index c5ec2e4..05dcfac 100644
--- a/bugbear.py
+++ b/bugbear.py
@@ -640,10 +640,15 @@ def empty_body(body) -> bool:
                 isinstance(stmt, ast.Pass)
                 or (
                     isinstance(stmt, ast.Expr)
-                    and isinstance(stmt.value, ast.Constant)
                     and (
-                        stmt.value.value is Ellipsis
-                        or isinstance(stmt.value.value, str)
+                        isinstance(stmt.value, (ast.Ellipsis, ast.Str))
+                        or (
+                            isinstance(stmt.value, ast.Constant)
+                            and (
+                                stmt.value.value is Ellipsis
+                                or isinstance(stmt.value.value, str)
+                            )
+                        )
                     )
                 )
                 for stmt in body
diff --git a/tests/test_bugbear.py b/tests/test_bugbear.py
index e15c926..977bfe5 100644
--- a/tests/test_bugbear.py
+++ b/tests/test_bugbear.py
@@ -407,7 +407,7 @@ def test_b027(self):
             B027(16, 4, vars=("empty_2",)),
             B027(19, 4, vars=("empty_3",)),
             B027(23, 4, vars=("empty_4",)),
-            B027(31, 4, vars=("empty_5",)),
+            B027(31 if sys.version_info > (3, 7) else 30, 4, vars=("empty_5",)),
         )
         self.assertEqual(errors, expected)